essentially its EOL once a new OS comes out and only security and compatibility updates are released.
If you still have a copy and a Mac that supports it, then you should be fine to use 10.9.5 and be good where you're at.

Now that 10.12 has been released, 10.9.5 will not receive any more security patches. This is the model that Apple has followed for several years now: the current and 2 previous versions of OS X are supposed with security updates.

Now that 10.12 has been released, 10.9.5 will not receive any more security patches. This is the model that Apple has followed for several years now: the current and 2 previous versions of OS X are supposed with security updates.

Click to expand...

Yes, Mavericks (10.9) already hasn't received the latest security update from Apple so I would assume that it is done receiving security patches unfortunately.

I never worry about security, I got sixth sense when my box maybe infected then do a restore. EOL to me is when an App you require to run no longer works. I notice a couple of website don't work with 10.9.5's Safari anymore, am able to compensate with Firefox, for now.

Gonna hold onto 10.9.5 until the bitter end, the last of its kind before all the ugly "Flat" stuff no-taste punk at Cupertino impose on us.

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